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Macarthur Cyanide Process For Silver Extraction

2016-9-21the cyanide process for the treatment of gold ores it purchased, in 1887, the cyanide process patents of macarthur and forrestn 1889, its capital was increased to 750,000, all paid in and in 1892 to when the the american patents were sold to the american gold and silver extraction com- pany, of denver, for 2,000,000 in shares.

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